1 /*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/javaClasses.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/debugInfo.hpp"
31 #include "code/pcDesc.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "interpreter/interpreter.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "memory/universe.inline.hpp"
37 #include "oops/fieldStreams.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceMirrorKlass.hpp"
40 #include "oops/klass.hpp"
41 #include "oops/method.hpp"
42 #include "oops/symbol.hpp"
43 #include "oops/typeArrayOop.hpp"
44 #include "runtime/fieldDescriptor.hpp"
45 #include "runtime/handles.inline.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/java.hpp"
48 #include "runtime/javaCalls.hpp"
49 #include "runtime/safepoint.hpp"
50 #include "runtime/thread.inline.hpp"
51 #include "runtime/vframe.hpp"
52 #include "utilities/preserveException.hpp"
53
54 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
55 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
56
57 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
58 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
59
60 InjectedField JavaClasses::_injected_fields[] = {
61 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
62 };
63
64 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
65 return _injected_fields[id].compute_offset();
66 }
67
68
69 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
70 *field_count = 0;
71
72 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
73 if (sid == vmSymbols::NO_SID) {
74 // Only well known classes can inject fields
75 return NULL;
76 }
77
78 int count = 0;
79 int start = -1;
80
81 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
82 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
83 count++; \
84 if (start == -1) start = klass##_##name##_enum; \
85 }
86 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
87 #undef LOOKUP_INJECTED_FIELD
88
89 if (start != -1) {
90 *field_count = count;
91 return _injected_fields + start;
92 }
93 return NULL;
94 }
95
96
97 static bool find_field(InstanceKlass* ik,
98 Symbol* name_symbol, Symbol* signature_symbol,
99 fieldDescriptor* fd,
100 bool allow_super = false) {
101 if (allow_super)
102 return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
103 else
104 return ik->find_local_field(name_symbol, signature_symbol, fd);
105 }
106
107 // Helpful routine for computing field offsets at run time rather than hardcoding them
108 static void
109 compute_offset(int &dest_offset,
110 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
111 bool allow_super = false) {
112 fieldDescriptor fd;
113 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
114 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
115 ResourceMark rm;
116 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
117 #ifndef PRODUCT
118 klass_oop->print();
119 tty->print_cr("all fields:");
120 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
121 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
122 }
123 #endif //PRODUCT
124 fatal("Invalid layout of preloaded class");
125 }
126 dest_offset = fd.offset();
127 }
128
129 // Same as above but for "optional" offsets that might not be present in certain JDK versions
130 static void
131 compute_optional_offset(int& dest_offset,
132 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
133 bool allow_super = false) {
134 fieldDescriptor fd;
135 InstanceKlass* ik = InstanceKlass::cast(klass_oop);
136 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
137 dest_offset = fd.offset();
138 }
139 }
140
141
142 int java_lang_String::value_offset = 0;
143 int java_lang_String::offset_offset = 0;
144 int java_lang_String::count_offset = 0;
145 int java_lang_String::hash_offset = 0;
146
147 bool java_lang_String::initialized = false;
148
149 void java_lang_String::compute_offsets() {
150 assert(!initialized, "offsets should be initialized only once");
151
152 Klass* k = SystemDictionary::String_klass();
153 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature());
154 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
155 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature());
156 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature());
157
158 initialized = true;
159 }
160
161 Handle java_lang_String::basic_create(int length, TRAPS) {
162 assert(initialized, "Must be initialized");
163 // Create the String object first, so there's a chance that the String
164 // and the char array it points to end up in the same cache line.
165 oop obj;
166 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
167
168 // Create the char array. The String object must be handlized here
169 // because GC can happen as a result of the allocation attempt.
170 Handle h_obj(THREAD, obj);
171 typeArrayOop buffer;
172 buffer = oopFactory::new_charArray(length, CHECK_NH);
173
174 // Point the String at the char array
175 obj = h_obj();
176 set_value(obj, buffer);
177 // No need to zero the offset, allocation zero'ed the entire String object
178 assert(offset(obj) == 0, "initial String offset should be zero");
179 //set_offset(obj, 0);
180 set_count(obj, length);
181
182 return h_obj;
183 }
184
185 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
186 Handle h_obj = basic_create(length, CHECK_NH);
187 typeArrayOop buffer = value(h_obj());
188 for (int index = 0; index < length; index++) {
189 buffer->char_at_put(index, unicode[index]);
190 }
191 return h_obj;
192 }
193
194 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
195 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
196 return h_obj();
197 }
198
199 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
200 if (utf8_str == NULL) {
201 return Handle();
202 }
203 int length = UTF8::unicode_length(utf8_str);
204 Handle h_obj = basic_create(length, CHECK_NH);
205 if (length > 0) {
206 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
207 }
208 return h_obj;
209 }
210
211 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
212 Handle h_obj = create_from_str(utf8_str, CHECK_0);
213 return h_obj();
214 }
215
216 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
217 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
218 Handle h_obj = basic_create(length, CHECK_NH);
219 if (length > 0) {
220 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
221 }
222 return h_obj;
223 }
224
225 // Converts a C string to a Java String based on current encoding
226 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
227 assert(str != NULL, "bad arguments");
228
229 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
230 static to_java_string_fn_t _to_java_string_fn = NULL;
231
232 if (_to_java_string_fn == NULL) {
233 void *lib_handle = os::native_java_library();
234 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
235 if (_to_java_string_fn == NULL) {
236 fatal("NewStringPlatform missing");
237 }
238 }
239
240 jstring js = NULL;
241 { JavaThread* thread = (JavaThread*)THREAD;
242 assert(thread->is_Java_thread(), "must be java thread");
243 HandleMark hm(thread);
244 ThreadToNativeFromVM ttn(thread);
245 js = (_to_java_string_fn)(thread->jni_environment(), str);
246 }
247 return Handle(THREAD, JNIHandles::resolve(js));
248 }
249
250 // Converts a Java String to a native C string that can be used for
251 // native OS calls.
252 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
253
254 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
255 static to_platform_string_fn_t _to_platform_string_fn = NULL;
256
257 if (_to_platform_string_fn == NULL) {
258 void *lib_handle = os::native_java_library();
259 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
260 if (_to_platform_string_fn == NULL) {
261 fatal("GetStringPlatformChars missing");
262 }
263 }
264
265 char *native_platform_string;
266 { JavaThread* thread = (JavaThread*)THREAD;
267 assert(thread->is_Java_thread(), "must be java thread");
268 JNIEnv *env = thread->jni_environment();
269 jstring js = (jstring) JNIHandles::make_local(env, java_string());
270 bool is_copy;
271 HandleMark hm(thread);
272 ThreadToNativeFromVM ttn(thread);
273 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
274 assert(is_copy == JNI_TRUE, "is_copy value changed");
275 JNIHandles::destroy_local(js);
276 }
277 return native_platform_string;
278 }
279
280 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
281 oop obj = java_string();
282 // Typical usage is to convert all '/' to '.' in string.
283 typeArrayOop value = java_lang_String::value(obj);
284 int offset = java_lang_String::offset(obj);
285 int length = java_lang_String::length(obj);
286
287 // First check if any from_char exist
288 int index; // Declared outside, used later
289 for (index = 0; index < length; index++) {
290 if (value->char_at(index + offset) == from_char) {
291 break;
292 }
293 }
294 if (index == length) {
295 // No from_char, so do not copy.
296 return java_string;
297 }
298
299 // Create new UNICODE buffer. Must handlize value because GC
300 // may happen during String and char array creation.
301 typeArrayHandle h_value(THREAD, value);
302 Handle string = basic_create(length, CHECK_NH);
303
304 typeArrayOop from_buffer = h_value();
305 typeArrayOop to_buffer = java_lang_String::value(string());
306
307 // Copy contents
308 for (index = 0; index < length; index++) {
309 jchar c = from_buffer->char_at(index + offset);
310 if (c == from_char) {
311 c = to_char;
312 }
313 to_buffer->char_at_put(index, c);
314 }
315 return string;
316 }
317
318 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
319 typeArrayOop value = java_lang_String::value(java_string);
320 int offset = java_lang_String::offset(java_string);
321 length = java_lang_String::length(java_string);
322
323 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
324 if (result != NULL) {
325 for (int index = 0; index < length; index++) {
326 result[index] = value->char_at(index + offset);
327 }
328 } else {
329 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
330 }
331 return result;
332 }
333
334 unsigned int java_lang_String::hash_code(oop java_string) {
335 int length = java_lang_String::length(java_string);
336 // Zero length string will hash to zero with String.hashCode() function.
337 if (length == 0) return 0;
338
339 typeArrayOop value = java_lang_String::value(java_string);
340 int offset = java_lang_String::offset(java_string);
341 return java_lang_String::hash_code(value->char_at_addr(offset), length);
342 }
343
344 char* java_lang_String::as_quoted_ascii(oop java_string) {
345 typeArrayOop value = java_lang_String::value(java_string);
346 int offset = java_lang_String::offset(java_string);
347 int length = java_lang_String::length(java_string);
348
349 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
350 if (base == NULL) return NULL;
351
352 int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
353 char* result = NEW_RESOURCE_ARRAY(char, result_length);
354 UNICODE::as_quoted_ascii(base, length, result, result_length);
355 assert(result_length >= length + 1, "must not be shorter");
356 assert(result_length == (int)strlen(result) + 1, "must match");
357 return result;
358 }
359
360 unsigned int java_lang_String::hash_string(oop java_string) {
361 int length = java_lang_String::length(java_string);
362 // Zero length string doesn't hash necessarily hash to zero.
363 if (length == 0) {
364 return StringTable::hash_string(NULL, 0);
365 }
366
367 typeArrayOop value = java_lang_String::value(java_string);
368 int offset = java_lang_String::offset(java_string);
369 return StringTable::hash_string(value->char_at_addr(offset), length);
370 }
371
372 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
373 oop obj = java_string();
374 typeArrayOop value = java_lang_String::value(obj);
375 int offset = java_lang_String::offset(obj);
376 int length = java_lang_String::length(obj);
377 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
378 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
379 return sym;
380 }
381
382 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
383 typeArrayOop value = java_lang_String::value(java_string);
384 int offset = java_lang_String::offset(java_string);
385 int length = java_lang_String::length(java_string);
386 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
387 return SymbolTable::probe_unicode(base, length);
388 }
389
390
391 int java_lang_String::utf8_length(oop java_string) {
392 typeArrayOop value = java_lang_String::value(java_string);
393 int offset = java_lang_String::offset(java_string);
394 int length = java_lang_String::length(java_string);
395 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
396 return UNICODE::utf8_length(position, length);
397 }
398
399 char* java_lang_String::as_utf8_string(oop java_string) {
400 typeArrayOop value = java_lang_String::value(java_string);
401 int offset = java_lang_String::offset(java_string);
402 int length = java_lang_String::length(java_string);
403 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
404 return UNICODE::as_utf8(position, length);
405 }
406
407 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
408 typeArrayOop value = java_lang_String::value(java_string);
409 int offset = java_lang_String::offset(java_string);
410 int length = java_lang_String::length(java_string);
411 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
412 return UNICODE::as_utf8(position, length, buf, buflen);
413 }
414
415 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
416 typeArrayOop value = java_lang_String::value(java_string);
417 int offset = java_lang_String::offset(java_string);
418 int length = java_lang_String::length(java_string);
419 assert(start + len <= length, "just checking");
420 jchar* position = value->char_at_addr(offset + start);
421 return UNICODE::as_utf8(position, len);
422 }
423
424 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
425 assert(java_string->klass() == SystemDictionary::String_klass(),
426 "must be java_string");
427 typeArrayOop value = java_lang_String::value(java_string);
428 int offset = java_lang_String::offset(java_string);
429 int length = java_lang_String::length(java_string);
430 if (length != len) {
431 return false;
432 }
433 for (int i = 0; i < len; i++) {
434 if (value->char_at(i + offset) != chars[i]) {
435 return false;
436 }
437 }
438 return true;
439 }
440
441 bool java_lang_String::equals(oop str1, oop str2) {
442 assert(str1->klass() == SystemDictionary::String_klass(),
443 "must be java String");
444 assert(str2->klass() == SystemDictionary::String_klass(),
445 "must be java String");
446 typeArrayOop value1 = java_lang_String::value(str1);
447 int offset1 = java_lang_String::offset(str1);
448 int length1 = java_lang_String::length(str1);
449 typeArrayOop value2 = java_lang_String::value(str2);
450 int offset2 = java_lang_String::offset(str2);
451 int length2 = java_lang_String::length(str2);
452
453 if (length1 != length2) {
454 return false;
455 }
456 for (int i = 0; i < length1; i++) {
457 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
458 return false;
459 }
460 }
461 return true;
462 }
463
464 void java_lang_String::print(Handle java_string, outputStream* st) {
465 oop obj = java_string();
466 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string");
467 typeArrayOop value = java_lang_String::value(obj);
468 int offset = java_lang_String::offset(obj);
469 int length = java_lang_String::length(obj);
470
471 int end = MIN2(length, 100);
472 if (value == NULL) {
473 // This can happen if, e.g., printing a String
474 // object before its initializer has been called
475 st->print_cr("NULL");
476 } else {
477 st->print("\"");
478 for (int index = 0; index < length; index++) {
479 st->print("%c", value->char_at(index + offset));
480 }
481 st->print("\"");
482 }
483 }
484
485 static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
486 Handle mirror (THREAD, fd->field_holder()->java_mirror());
487 assert(mirror.not_null() && fd->is_static(), "just checking");
488 if (fd->has_initial_value()) {
489 BasicType t = fd->field_type();
490 switch (t) {
491 case T_BYTE:
492 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
493 break;
494 case T_BOOLEAN:
495 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
496 break;
497 case T_CHAR:
498 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
499 break;
500 case T_SHORT:
501 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
502 break;
503 case T_INT:
504 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
505 break;
506 case T_FLOAT:
507 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
508 break;
509 case T_DOUBLE:
510 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
511 break;
512 case T_LONG:
513 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
514 break;
515 case T_OBJECT:
516 {
517 #ifdef ASSERT
518 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
519 assert(fd->signature() == sym, "just checking");
520 #endif
521 oop string = fd->string_initial_value(CHECK);
522 mirror()->obj_field_put(fd->offset(), string);
523 }
524 break;
525 default:
526 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
527 "Illegal ConstantValue attribute in class file");
528 }
529 }
530 }
531
532
533 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
534 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
535
536 // If the offset was read from the shared archive, it was fixed up already
537 if (!k->is_shared()) {
538 if (k->oop_is_instance()) {
539 // During bootstrap, java.lang.Class wasn't loaded so static field
540 // offsets were computed without the size added it. Go back and
541 // update all the static field offsets to included the size.
542 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
543 if (fs.access_flags().is_static()) {
544 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
545 fs.set_offset(real_offset);
546 }
547 }
548 }
549 }
550 create_mirror(k, Handle(NULL), CHECK);
551 }
552
553 oop java_lang_Class::create_mirror(KlassHandle k, Handle protection_domain, TRAPS) {
554 assert(k->java_mirror() == NULL, "should only assign mirror once");
555 // Use this moment of initialization to cache modifier_flags also,
556 // to support Class.getModifiers(). Instance classes recalculate
557 // the cached flags after the class file is parsed, but before the
558 // class is put into the system dictionary.
559 int computed_modifiers = k->compute_modifier_flags(CHECK_0);
560 k->set_modifier_flags(computed_modifiers);
561 // Class_klass has to be loaded because it is used to allocate
562 // the mirror.
563 if (SystemDictionary::Class_klass_loaded()) {
564 // Allocate mirror (java.lang.Class instance)
565 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0);
566
567 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
568 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
569
570 // It might also have a component mirror. This mirror must already exist.
571 if (k->oop_is_array()) {
572 Handle comp_mirror;
573 if (k->oop_is_typeArray()) {
574 BasicType type = TypeArrayKlass::cast(k())->element_type();
575 comp_mirror = Universe::java_mirror(type);
576 } else {
577 assert(k->oop_is_objArray(), "Must be");
578 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
579 assert(element_klass != NULL, "Must have an element klass");
580 comp_mirror = element_klass->java_mirror();
581 }
582 assert(comp_mirror.not_null(), "must have a mirror");
583
584 // Two-way link between the array klass and its component mirror:
585 ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
586 set_array_klass(comp_mirror(), k());
587 } else {
588 assert(k->oop_is_instance(), "Must be");
589
590 // Allocate a simple java object for a lock.
591 // This needs to be a java object because during class initialization
592 // it can be held across a java call.
593 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_NULL);
594 set_init_lock(mirror(), r);
595
596 // Set protection domain also
597 set_protection_domain(mirror(), protection_domain());
598
599 // Initialize static fields
600 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL);
601 }
602 return mirror();
603 } else {
604 if (fixup_mirror_list() == NULL) {
605 GrowableArray<Klass*>* list =
606 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
607 set_fixup_mirror_list(list);
608 }
609 fixup_mirror_list()->push(k());
610 return NULL;
611 }
612 }
613
614
615
616 int java_lang_Class::oop_size(oop java_class) {
617 assert(_oop_size_offset != 0, "must be set");
618 return java_class->int_field(_oop_size_offset);
619 }
620 void java_lang_Class::set_oop_size(oop java_class, int size) {
621 assert(_oop_size_offset != 0, "must be set");
622 java_class->int_field_put(_oop_size_offset, size);
623 }
624 int java_lang_Class::static_oop_field_count(oop java_class) {
625 assert(_static_oop_field_count_offset != 0, "must be set");
626 return java_class->int_field(_static_oop_field_count_offset);
627 }
628 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
629 assert(_static_oop_field_count_offset != 0, "must be set");
630 java_class->int_field_put(_static_oop_field_count_offset, size);
631 }
632
633 oop java_lang_Class::protection_domain(oop java_class) {
634 assert(_protection_domain_offset != 0, "must be set");
635 return java_class->obj_field(_protection_domain_offset);
636 }
637 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
638 assert(_protection_domain_offset != 0, "must be set");
639 java_class->obj_field_put(_protection_domain_offset, pd);
640 }
641
642 oop java_lang_Class::init_lock(oop java_class) {
643 assert(_init_lock_offset != 0, "must be set");
644 return java_class->obj_field(_init_lock_offset);
645 }
646 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
647 assert(_init_lock_offset != 0, "must be set");
648 java_class->obj_field_put(_init_lock_offset, init_lock);
649 }
650
651 objArrayOop java_lang_Class::signers(oop java_class) {
652 assert(_signers_offset != 0, "must be set");
653 return (objArrayOop)java_class->obj_field(_signers_offset);
654 }
655 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
656 assert(_signers_offset != 0, "must be set");
657 java_class->obj_field_put(_signers_offset, (oop)signers);
658 }
659
660
661 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
662 // This should be improved by adding a field at the Java level or by
663 // introducing a new VM klass (see comment in ClassFileParser)
664 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
665 if (type != T_VOID) {
666 Klass* aklass = Universe::typeArrayKlassObj(type);
667 assert(aklass != NULL, "correct bootstrap");
668 set_array_klass(java_class, aklass);
669 }
670 #ifdef ASSERT
671 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
672 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
673 #endif
674 return java_class;
675 }
676
677
678 Klass* java_lang_Class::as_Klass(oop java_class) {
679 //%note memory_2
680 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
681 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
682 assert(k == NULL || k->is_klass(), "type check");
683 return k;
684 }
685
686
687 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
688 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
689 java_class->metadata_field_put(_klass_offset, klass);
690 }
691
692
693 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
694 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
695 Symbol* name = NULL;
696 bool is_instance = false;
697 if (is_primitive(java_class)) {
698 name = vmSymbols::type_signature(primitive_type(java_class));
699 } else {
700 Klass* k = as_Klass(java_class);
701 is_instance = k->oop_is_instance();
702 name = k->name();
703 }
704 if (name == NULL) {
705 st->print("<null>");
706 return;
707 }
708 if (is_instance) st->print("L");
709 st->write((char*) name->base(), (int) name->utf8_length());
710 if (is_instance) st->print(";");
711 }
712
713 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
714 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
715 Symbol* name;
716 if (is_primitive(java_class)) {
717 name = vmSymbols::type_signature(primitive_type(java_class));
718 // Because this can create a new symbol, the caller has to decrement
719 // the refcount, so make adjustment here and below for symbols returned
720 // that are not created or incremented due to a successful lookup.
721 name->increment_refcount();
722 } else {
723 Klass* k = as_Klass(java_class);
724 if (!k->oop_is_instance()) {
725 name = k->name();
726 name->increment_refcount();
727 } else {
728 ResourceMark rm;
729 const char* sigstr = k->signature_name();
730 int siglen = (int) strlen(sigstr);
731 if (!intern_if_not_found) {
732 name = SymbolTable::probe(sigstr, siglen);
733 } else {
734 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
735 }
736 }
737 }
738 return name;
739 }
740
741
742 Klass* java_lang_Class::array_klass(oop java_class) {
743 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
744 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
745 return k;
746 }
747
748
749 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
750 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
751 java_class->metadata_field_put(_array_klass_offset, klass);
752 }
753
754
755 bool java_lang_Class::is_primitive(oop java_class) {
756 // should assert:
757 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
758 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
759
760 #ifdef ASSERT
761 if (is_primitive) {
762 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
763 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
764 "Should be either the T_VOID primitive or a java primitive");
765 }
766 #endif
767
768 return is_primitive;
769 }
770
771
772 BasicType java_lang_Class::primitive_type(oop java_class) {
773 assert(java_lang_Class::is_primitive(java_class), "just checking");
774 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
775 BasicType type = T_VOID;
776 if (ak != NULL) {
777 // Note: create_basic_type_mirror above initializes ak to a non-null value.
778 type = ArrayKlass::cast(ak)->element_type();
779 } else {
780 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
781 }
782 assert(Universe::java_mirror(type) == java_class, "must be consistent");
783 return type;
784 }
785
786 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
787 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
788 if (is_primitive(java_class)) {
789 if (reference_klass != NULL)
790 (*reference_klass) = NULL;
791 return primitive_type(java_class);
792 } else {
793 if (reference_klass != NULL)
794 (*reference_klass) = as_Klass(java_class);
795 return T_OBJECT;
796 }
797 }
798
799
800 oop java_lang_Class::primitive_mirror(BasicType t) {
801 oop mirror = Universe::java_mirror(t);
802 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
803 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
804 return mirror;
805 }
806
807 bool java_lang_Class::offsets_computed = false;
808 int java_lang_Class::classRedefinedCount_offset = -1;
809
810 void java_lang_Class::compute_offsets() {
811 assert(!offsets_computed, "offsets should be initialized only once");
812 offsets_computed = true;
813
814 Klass* klass_oop = SystemDictionary::Class_klass();
815 // The classRedefinedCount field is only present starting in 1.5,
816 // so don't go fatal.
817 compute_optional_offset(classRedefinedCount_offset,
818 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
819
820 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
821 }
822
823 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
824 if (!JDK_Version::is_gte_jdk15x_version()
825 || classRedefinedCount_offset == -1) {
826 // The classRedefinedCount field is only present starting in 1.5.
827 // If we don't have an offset for it then just return -1 as a marker.
828 return -1;
829 }
830
831 return the_class_mirror->int_field(classRedefinedCount_offset);
832 }
833
834 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
835 if (!JDK_Version::is_gte_jdk15x_version()
836 || classRedefinedCount_offset == -1) {
837 // The classRedefinedCount field is only present starting in 1.5.
838 // If we don't have an offset for it then nothing to set.
839 return;
840 }
841
842 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
843 }
844
845
846 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
847 // platform thread structure, and a eetop offset which was used for thread
848 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
849 // merged, so in the HotSpot VM we just use the eetop field for the thread
850 // instead of the privateInfo_offset.
851 //
852 // Note: The stackSize field is only present starting in 1.4.
853
854 int java_lang_Thread::_name_offset = 0;
855 int java_lang_Thread::_group_offset = 0;
856 int java_lang_Thread::_contextClassLoader_offset = 0;
857 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
858 int java_lang_Thread::_priority_offset = 0;
859 int java_lang_Thread::_eetop_offset = 0;
860 int java_lang_Thread::_daemon_offset = 0;
861 int java_lang_Thread::_stillborn_offset = 0;
862 int java_lang_Thread::_stackSize_offset = 0;
863 int java_lang_Thread::_tid_offset = 0;
864 int java_lang_Thread::_thread_status_offset = 0;
865 int java_lang_Thread::_park_blocker_offset = 0;
866 int java_lang_Thread::_park_event_offset = 0 ;
867
868
869 void java_lang_Thread::compute_offsets() {
870 assert(_group_offset == 0, "offsets should be initialized only once");
871
872 Klass* k = SystemDictionary::Thread_klass();
873 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature());
874 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
875 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
876 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
877 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
878 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
879 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature());
880 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
881 // The stackSize field is only present starting in 1.4, so don't go fatal.
882 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
883 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
884 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
885 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
886 // The parkBlocker field is only present starting in 1.6, so don't go fatal.
887 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
888 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
889 vmSymbols::long_signature());
890 }
891
892
893 JavaThread* java_lang_Thread::thread(oop java_thread) {
894 return (JavaThread*)java_thread->address_field(_eetop_offset);
895 }
896
897
898 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
899 java_thread->address_field_put(_eetop_offset, (address)thread);
900 }
901
902
903 typeArrayOop java_lang_Thread::name(oop java_thread) {
904 oop name = java_thread->obj_field(_name_offset);
905 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking");
906 return typeArrayOop(name);
907 }
908
909
910 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) {
911 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL");
912 java_thread->obj_field_put(_name_offset, name);
913 }
914
915
916 ThreadPriority java_lang_Thread::priority(oop java_thread) {
917 return (ThreadPriority)java_thread->int_field(_priority_offset);
918 }
919
920
921 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
922 java_thread->int_field_put(_priority_offset, priority);
923 }
924
925
926 oop java_lang_Thread::threadGroup(oop java_thread) {
927 return java_thread->obj_field(_group_offset);
928 }
929
930
931 bool java_lang_Thread::is_stillborn(oop java_thread) {
932 return java_thread->bool_field(_stillborn_offset) != 0;
933 }
934
935
936 // We never have reason to turn the stillborn bit off
937 void java_lang_Thread::set_stillborn(oop java_thread) {
938 java_thread->bool_field_put(_stillborn_offset, true);
939 }
940
941
942 bool java_lang_Thread::is_alive(oop java_thread) {
943 JavaThread* thr = java_lang_Thread::thread(java_thread);
944 return (thr != NULL);
945 }
946
947
948 bool java_lang_Thread::is_daemon(oop java_thread) {
949 return java_thread->bool_field(_daemon_offset) != 0;
950 }
951
952
953 void java_lang_Thread::set_daemon(oop java_thread) {
954 java_thread->bool_field_put(_daemon_offset, true);
955 }
956
957 oop java_lang_Thread::context_class_loader(oop java_thread) {
958 return java_thread->obj_field(_contextClassLoader_offset);
959 }
960
961 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
962 return java_thread->obj_field(_inheritedAccessControlContext_offset);
963 }
964
965
966 jlong java_lang_Thread::stackSize(oop java_thread) {
967 // The stackSize field is only present starting in 1.4
968 if (_stackSize_offset > 0) {
969 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
970 return java_thread->long_field(_stackSize_offset);
971 } else {
972 return 0;
973 }
974 }
975
976 // Write the thread status value to threadStatus field in java.lang.Thread java class.
977 void java_lang_Thread::set_thread_status(oop java_thread,
978 java_lang_Thread::ThreadStatus status) {
979 // The threadStatus is only present starting in 1.5
980 if (_thread_status_offset > 0) {
981 java_thread->int_field_put(_thread_status_offset, status);
982 }
983 }
984
985 // Read thread status value from threadStatus field in java.lang.Thread java class.
986 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
987 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
988 JavaThread::current()->thread_state() == _thread_in_vm,
989 "Java Thread is not running in vm");
990 // The threadStatus is only present starting in 1.5
991 if (_thread_status_offset > 0) {
992 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
993 } else {
994 // All we can easily figure out is if it is alive, but that is
995 // enough info for a valid unknown status.
996 // These aren't restricted to valid set ThreadStatus values, so
997 // use JVMTI values and cast.
998 JavaThread* thr = java_lang_Thread::thread(java_thread);
999 if (thr == NULL) {
1000 // the thread hasn't run yet or is in the process of exiting
1001 return NEW;
1002 }
1003 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1004 }
1005 }
1006
1007
1008 jlong java_lang_Thread::thread_id(oop java_thread) {
1009 // The thread ID field is only present starting in 1.5
1010 if (_tid_offset > 0) {
1011 return java_thread->long_field(_tid_offset);
1012 } else {
1013 return 0;
1014 }
1015 }
1016
1017 oop java_lang_Thread::park_blocker(oop java_thread) {
1018 assert(JDK_Version::current().supports_thread_park_blocker() &&
1019 _park_blocker_offset != 0, "Must support parkBlocker field");
1020
1021 if (_park_blocker_offset > 0) {
1022 return java_thread->obj_field(_park_blocker_offset);
1023 }
1024
1025 return NULL;
1026 }
1027
1028 jlong java_lang_Thread::park_event(oop java_thread) {
1029 if (_park_event_offset > 0) {
1030 return java_thread->long_field(_park_event_offset);
1031 }
1032 return 0;
1033 }
1034
1035 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1036 if (_park_event_offset > 0) {
1037 java_thread->long_field_put(_park_event_offset, ptr);
1038 return true;
1039 }
1040 return false;
1041 }
1042
1043
1044 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1045 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1046 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1047 switch (status) {
1048 case NEW : return "NEW";
1049 case RUNNABLE : return "RUNNABLE";
1050 case SLEEPING : return "TIMED_WAITING (sleeping)";
1051 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1052 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1053 case PARKED : return "WAITING (parking)";
1054 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1055 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1056 case TERMINATED : return "TERMINATED";
1057 default : return "UNKNOWN";
1058 };
1059 }
1060 int java_lang_ThreadGroup::_parent_offset = 0;
1061 int java_lang_ThreadGroup::_name_offset = 0;
1062 int java_lang_ThreadGroup::_threads_offset = 0;
1063 int java_lang_ThreadGroup::_groups_offset = 0;
1064 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1065 int java_lang_ThreadGroup::_destroyed_offset = 0;
1066 int java_lang_ThreadGroup::_daemon_offset = 0;
1067 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1068 int java_lang_ThreadGroup::_nthreads_offset = 0;
1069 int java_lang_ThreadGroup::_ngroups_offset = 0;
1070
1071 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1072 assert(java_thread_group->is_oop(), "thread group must be oop");
1073 return java_thread_group->obj_field(_parent_offset);
1074 }
1075
1076 // ("name as oop" accessor is not necessary)
1077
1078 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1079 oop name = java_thread_group->obj_field(_name_offset);
1080 // ThreadGroup.name can be null
1081 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1082 }
1083
1084 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1085 assert(java_thread_group->is_oop(), "thread group must be oop");
1086 return java_thread_group->int_field(_nthreads_offset);
1087 }
1088
1089 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1090 oop threads = java_thread_group->obj_field(_threads_offset);
1091 assert(threads != NULL, "threadgroups should have threads");
1092 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1093 return objArrayOop(threads);
1094 }
1095
1096 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1097 assert(java_thread_group->is_oop(), "thread group must be oop");
1098 return java_thread_group->int_field(_ngroups_offset);
1099 }
1100
1101 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1102 oop groups = java_thread_group->obj_field(_groups_offset);
1103 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1104 return objArrayOop(groups);
1105 }
1106
1107 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1108 assert(java_thread_group->is_oop(), "thread group must be oop");
1109 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1110 }
1111
1112 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1113 assert(java_thread_group->is_oop(), "thread group must be oop");
1114 return java_thread_group->bool_field(_destroyed_offset) != 0;
1115 }
1116
1117 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1118 assert(java_thread_group->is_oop(), "thread group must be oop");
1119 return java_thread_group->bool_field(_daemon_offset) != 0;
1120 }
1121
1122 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1123 assert(java_thread_group->is_oop(), "thread group must be oop");
1124 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1125 }
1126
1127 void java_lang_ThreadGroup::compute_offsets() {
1128 assert(_parent_offset == 0, "offsets should be initialized only once");
1129
1130 Klass* k = SystemDictionary::ThreadGroup_klass();
1131
1132 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1133 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1134 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1135 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1136 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1137 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1138 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1139 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1140 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1141 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1142 }
1143
1144 oop java_lang_Throwable::unassigned_stacktrace() {
1145 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1146 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1147 if (UseCompressedOops) {
1148 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1149 } else {
1150 return oopDesc::load_decode_heap_oop((oop*)addr);
1151 }
1152 }
1153
1154 oop java_lang_Throwable::backtrace(oop throwable) {
1155 return throwable->obj_field_acquire(backtrace_offset);
1156 }
1157
1158
1159 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1160 throwable->release_obj_field_put(backtrace_offset, value);
1161 }
1162
1163
1164 oop java_lang_Throwable::message(oop throwable) {
1165 return throwable->obj_field(detailMessage_offset);
1166 }
1167
1168
1169 oop java_lang_Throwable::message(Handle throwable) {
1170 return throwable->obj_field(detailMessage_offset);
1171 }
1172
1173
1174 void java_lang_Throwable::set_message(oop throwable, oop value) {
1175 throwable->obj_field_put(detailMessage_offset, value);
1176 }
1177
1178
1179 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1180 throwable->obj_field_put(stackTrace_offset, st_element_array);
1181 }
1182
1183 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1184 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1185 set_stacktrace(throwable, NULL);
1186 }
1187
1188
1189 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1190 ResourceMark rm;
1191 Klass* k = throwable->klass();
1192 assert(k != NULL, "just checking");
1193 st->print("%s", InstanceKlass::cast(k)->external_name());
1194 oop msg = message(throwable);
1195 if (msg != NULL) {
1196 st->print(": %s", java_lang_String::as_utf8_string(msg));
1197 }
1198 }
1199
1200
1201 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1202 ResourceMark rm;
1203 Klass* k = throwable->klass();
1204 assert(k != NULL, "just checking");
1205 st->print("%s", InstanceKlass::cast(k)->external_name());
1206 oop msg = message(throwable);
1207 if (msg != NULL) {
1208 st->print(": %s", java_lang_String::as_utf8_string(msg));
1209 }
1210 }
1211
1212 // After this many redefines, the stack trace is unreliable.
1213 const int MAX_VERSION = USHRT_MAX;
1214
1215 // Helper backtrace functions to store bci|version together.
1216 static inline int merge_bci_and_version(int bci, int version) {
1217 // only store u2 for version, checking for overflow.
1218 if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1219 assert((jushort)bci == bci, "bci should be short");
1220 return build_int_from_shorts(version, bci);
1221 }
1222
1223 static inline int bci_at(unsigned int merged) {
1224 return extract_high_short_from_int(merged);
1225 }
1226 static inline int version_at(unsigned int merged) {
1227 return extract_low_short_from_int(merged);
1228 }
1229
1230 static inline bool version_matches(Method* method, int version) {
1231 return (method->constants()->version() == version && version < MAX_VERSION);
1232 }
1233
1234 static inline int get_line_number(Method* method, int bci) {
1235 int line_number = 0;
1236 if (method->is_native()) {
1237 // Negative value different from -1 below, enabling Java code in
1238 // class java.lang.StackTraceElement to distinguish "native" from
1239 // "no LineNumberTable". JDK tests for -2.
1240 line_number = -2;
1241 } else {
1242 // Returns -1 if no LineNumberTable, and otherwise actual line number
1243 line_number = method->line_number_from_bci(bci);
1244 if (line_number == -1 && ShowHiddenFrames) {
1245 line_number = bci + 1000000;
1246 }
1247 }
1248 return line_number;
1249 }
1250
1251 // This class provides a simple wrapper over the internal structure of
1252 // exception backtrace to insulate users of the backtrace from needing
1253 // to know what it looks like.
1254 class BacktraceBuilder: public StackObj {
1255 private:
1256 Handle _backtrace;
1257 objArrayOop _head;
1258 typeArrayOop _methods;
1259 typeArrayOop _bcis;
1260 objArrayOop _mirrors;
1261 int _index;
1262 No_Safepoint_Verifier _nsv;
1263
1264 public:
1265
1266 enum {
1267 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1268 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1269 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1270 trace_next_offset = java_lang_Throwable::trace_next_offset,
1271 trace_size = java_lang_Throwable::trace_size,
1272 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1273 };
1274
1275 // get info out of chunks
1276 static typeArrayOop get_methods(objArrayHandle chunk) {
1277 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1278 assert(methods != NULL, "method array should be initialized in backtrace");
1279 return methods;
1280 }
1281 static typeArrayOop get_bcis(objArrayHandle chunk) {
1282 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1283 assert(bcis != NULL, "bci array should be initialized in backtrace");
1284 return bcis;
1285 }
1286 static objArrayOop get_mirrors(objArrayHandle chunk) {
1287 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1288 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1289 return mirrors;
1290 }
1291
1292 // constructor for new backtrace
1293 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) {
1294 expand(CHECK);
1295 _backtrace = _head;
1296 _index = 0;
1297 }
1298
1299 BacktraceBuilder(objArrayHandle backtrace) {
1300 _methods = get_methods(backtrace);
1301 _bcis = get_bcis(backtrace);
1302 _mirrors = get_mirrors(backtrace);
1303 assert(_methods->length() == _bcis->length() &&
1304 _methods->length() == _mirrors->length(),
1305 "method and source information arrays should match");
1306
1307 // head is the preallocated backtrace
1308 _backtrace = _head = backtrace();
1309 _index = 0;
1310 }
1311
1312 void expand(TRAPS) {
1313 objArrayHandle old_head(THREAD, _head);
1314 Pause_No_Safepoint_Verifier pnsv(&_nsv);
1315
1316 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1317 objArrayHandle new_head(THREAD, head);
1318
1319 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1320 typeArrayHandle new_methods(THREAD, methods);
1321
1322 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1323 typeArrayHandle new_bcis(THREAD, bcis);
1324
1325 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1326 objArrayHandle new_mirrors(THREAD, mirrors);
1327
1328 if (!old_head.is_null()) {
1329 old_head->obj_at_put(trace_next_offset, new_head());
1330 }
1331 new_head->obj_at_put(trace_methods_offset, new_methods());
1332 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1333 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1334
1335 _head = new_head();
1336 _methods = new_methods();
1337 _bcis = new_bcis();
1338 _mirrors = new_mirrors();
1339 _index = 0;
1340 }
1341
1342 oop backtrace() {
1343 return _backtrace();
1344 }
1345
1346 inline void push(Method* method, int bci, TRAPS) {
1347 // Smear the -1 bci to 0 since the array only holds unsigned
1348 // shorts. The later line number lookup would just smear the -1
1349 // to a 0 even if it could be recorded.
1350 if (bci == SynchronizationEntryBCI) bci = 0;
1351
1352 if (_index >= trace_chunk_size) {
1353 methodHandle mhandle(THREAD, method);
1354 expand(CHECK);
1355 method = mhandle();
1356 }
1357
1358 _methods->short_at_put(_index, method->method_idnum());
1359 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1360
1361 // We need to save the mirrors in the backtrace to keep the class
1362 // from being unloaded while we still have this stack trace.
1363 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1364 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1365 _index++;
1366 }
1367
1368 };
1369
1370 // Print stack trace element to resource allocated buffer
1371 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1372 int method_id, int version, int bci) {
1373
1374 // Get strings and string lengths
1375 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1376 const char* klass_name = holder->external_name();
1377 int buf_len = (int)strlen(klass_name);
1378
1379 // The method id may point to an obsolete method, can't get more stack information
1380 Method* method = holder->method_with_idnum(method_id);
1381 if (method == NULL) {
1382 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1383 // This is what the java code prints in this case - added Redefined
1384 sprintf(buf, "\tat %s.null (Redefined)", klass_name);
1385 return buf;
1386 }
1387
1388 char* method_name = method->name()->as_C_string();
1389 buf_len += (int)strlen(method_name);
1390
1391 char* source_file_name = NULL;
1392 if (version_matches(method, version)) {
1393 Symbol* source = holder->source_file_name();
1394 if (source != NULL) {
1395 source_file_name = source->as_C_string();
1396 buf_len += (int)strlen(source_file_name);
1397 }
1398 }
1399
1400 // Allocate temporary buffer with extra space for formatting and line number
1401 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1402
1403 // Print stack trace line in buffer
1404 sprintf(buf, "\tat %s.%s", klass_name, method_name);
1405
1406 if (!version_matches(method, version)) {
1407 strcat(buf, "(Redefined)");
1408 } else {
1409 int line_number = get_line_number(method, bci);
1410 if (line_number == -2) {
1411 strcat(buf, "(Native Method)");
1412 } else {
1413 if (source_file_name != NULL && (line_number != -1)) {
1414 // Sourcename and linenumber
1415 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1416 } else if (source_file_name != NULL) {
1417 // Just sourcename
1418 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1419 } else {
1420 // Neither sourcename nor linenumber
1421 sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1422 }
1423 nmethod* nm = method->code();
1424 if (WizardMode && nm != NULL) {
1425 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1426 }
1427 }
1428 }
1429
1430 return buf;
1431 }
1432
1433 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1434 int method_id, int version, int bci) {
1435 ResourceMark rm;
1436 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci);
1437 st->print_cr("%s", buf);
1438 }
1439
1440 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1441 Handle mirror = method->method_holder()->java_mirror();
1442 int method_id = method->method_idnum();
1443 int version = method->constants()->version();
1444 print_stack_element(st, mirror, method_id, version, bci);
1445 }
1446
1447 const char* java_lang_Throwable::no_stack_trace_message() {
1448 return "\t<<no stack trace available>>";
1449 }
1450
1451
1452 // Currently used only for exceptions occurring during startup
1453 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1454 Thread *THREAD = Thread::current();
1455 Handle h_throwable(THREAD, throwable);
1456 while (h_throwable.not_null()) {
1457 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1458 if (result.is_null()) {
1459 st->print_cr(no_stack_trace_message());
1460 return;
1461 }
1462
1463 while (result.not_null()) {
1464
1465 // Get method id, bci, version and mirror from chunk
1466 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1467 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1468 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1469
1470 int length = methods()->length();
1471 for (int index = 0; index < length; index++) {
1472 Handle mirror(THREAD, mirrors->obj_at(index));
1473 // NULL mirror means end of stack trace
1474 if (mirror.is_null()) goto handle_cause;
1475 int method = methods->short_at(index);
1476 int version = version_at(bcis->int_at(index));
1477 int bci = bci_at(bcis->int_at(index));
1478 print_stack_element(st, mirror, method, version, bci);
1479 }
1480 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1481 }
1482 handle_cause:
1483 {
1484 EXCEPTION_MARK;
1485 JavaValue cause(T_OBJECT);
1486 JavaCalls::call_virtual(&cause,
1487 h_throwable,
1488 KlassHandle(THREAD, h_throwable->klass()),
1489 vmSymbols::getCause_name(),
1490 vmSymbols::void_throwable_signature(),
1491 THREAD);
1492 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1493 if (HAS_PENDING_EXCEPTION) {
1494 CLEAR_PENDING_EXCEPTION;
1495 h_throwable = Handle();
1496 } else {
1497 h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1498 if (h_throwable.not_null()) {
1499 st->print("Caused by: ");
1500 print(h_throwable, st);
1501 st->cr();
1502 }
1503 }
1504 }
1505 }
1506 }
1507
1508 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1509 if (!StackTraceInThrowable) return;
1510 ResourceMark rm(THREAD);
1511
1512 // Start out by clearing the backtrace for this object, in case the VM
1513 // runs out of memory while allocating the stack trace
1514 set_backtrace(throwable(), NULL);
1515 if (JDK_Version::is_gte_jdk14x_version()) {
1516 // New since 1.4, clear lazily constructed Java level stacktrace if
1517 // refilling occurs
1518 // This is unnecessary in 1.7+ but harmless
1519 clear_stacktrace(throwable());
1520 }
1521
1522 int max_depth = MaxJavaStackTraceDepth;
1523 JavaThread* thread = (JavaThread*)THREAD;
1524 BacktraceBuilder bt(CHECK);
1525
1526 // If there is no Java frame just return the method that was being called
1527 // with bci 0
1528 if (!thread->has_last_Java_frame()) {
1529 if (max_depth >= 1 && method() != NULL) {
1530 bt.push(method(), 0, CHECK);
1531 set_backtrace(throwable(), bt.backtrace());
1532 }
1533 return;
1534 }
1535
1536 // Instead of using vframe directly, this version of fill_in_stack_trace
1537 // basically handles everything by hand. This significantly improved the
1538 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1539 // See bug 6333838 for more details.
1540 // The "ASSERT" here is to verify this method generates the exactly same stack
1541 // trace as utilizing vframe.
1542 #ifdef ASSERT
1543 vframeStream st(thread);
1544 methodHandle st_method(THREAD, st.method());
1545 #endif
1546 int total_count = 0;
1547 RegisterMap map(thread, false);
1548 int decode_offset = 0;
1549 nmethod* nm = NULL;
1550 bool skip_fillInStackTrace_check = false;
1551 bool skip_throwableInit_check = false;
1552 bool skip_hidden = !ShowHiddenFrames;
1553
1554 for (frame fr = thread->last_frame(); max_depth != total_count;) {
1555 Method* method = NULL;
1556 int bci = 0;
1557
1558 // Compiled java method case.
1559 if (decode_offset != 0) {
1560 DebugInfoReadStream stream(nm, decode_offset);
1561 decode_offset = stream.read_int();
1562 method = (Method*)nm->metadata_at(stream.read_int());
1563 bci = stream.read_bci();
1564 } else {
1565 if (fr.is_first_frame()) break;
1566 address pc = fr.pc();
1567 if (fr.is_interpreted_frame()) {
1568 intptr_t bcx = fr.interpreter_frame_bcx();
1569 method = fr.interpreter_frame_method();
1570 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1571 fr = fr.sender(&map);
1572 } else {
1573 CodeBlob* cb = fr.cb();
1574 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1575 // but non nmethod
1576 fr = fr.sender(&map);
1577 if (cb == NULL || !cb->is_nmethod()) {
1578 continue;
1579 }
1580 nm = (nmethod*)cb;
1581 if (nm->method()->is_native()) {
1582 method = nm->method();
1583 bci = 0;
1584 } else {
1585 PcDesc* pd = nm->pc_desc_at(pc);
1586 decode_offset = pd->scope_decode_offset();
1587 // if decode_offset is not equal to 0, it will execute the
1588 // "compiled java method case" at the beginning of the loop.
1589 continue;
1590 }
1591 }
1592 }
1593 #ifdef ASSERT
1594 assert(st_method() == method && st.bci() == bci,
1595 "Wrong stack trace");
1596 st.next();
1597 // vframeStream::method isn't GC-safe so store off a copy
1598 // of the Method* in case we GC.
1599 if (!st.at_end()) {
1600 st_method = st.method();
1601 }
1602 #endif
1603
1604 // the format of the stacktrace will be:
1605 // - 1 or more fillInStackTrace frames for the exception class (skipped)
1606 // - 0 or more <init> methods for the exception class (skipped)
1607 // - rest of the stack
1608
1609 if (!skip_fillInStackTrace_check) {
1610 if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1611 method->name() == vmSymbols::fillInStackTrace0_name()) &&
1612 throwable->is_a(method->method_holder())) {
1613 continue;
1614 }
1615 else {
1616 skip_fillInStackTrace_check = true; // gone past them all
1617 }
1618 }
1619 if (!skip_throwableInit_check) {
1620 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1621
1622 // skip <init> methods of the exception class and superclasses
1623 // This is simlar to classic VM.
1624 if (method->name() == vmSymbols::object_initializer_name() &&
1625 throwable->is_a(method->method_holder())) {
1626 continue;
1627 } else {
1628 // there are none or we've seen them all - either way stop checking
1629 skip_throwableInit_check = true;
1630 }
1631 }
1632 if (method->is_hidden()) {
1633 if (skip_hidden) continue;
1634 }
1635 bt.push(method, bci, CHECK);
1636 total_count++;
1637 }
1638
1639 // Put completed stack trace into throwable object
1640 set_backtrace(throwable(), bt.backtrace());
1641 }
1642
1643 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1644 // No-op if stack trace is disabled
1645 if (!StackTraceInThrowable) {
1646 return;
1647 }
1648
1649 // Disable stack traces for some preallocated out of memory errors
1650 if (!Universe::should_fill_in_stack_trace(throwable)) {
1651 return;
1652 }
1653
1654 PRESERVE_EXCEPTION_MARK;
1655
1656 JavaThread* thread = JavaThread::active();
1657 fill_in_stack_trace(throwable, method, thread);
1658 // ignore exceptions thrown during stack trace filling
1659 CLEAR_PENDING_EXCEPTION;
1660 }
1661
1662 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1663 // Allocate stack trace - backtrace is created but not filled in
1664
1665 // No-op if stack trace is disabled
1666 if (!StackTraceInThrowable) return;
1667 BacktraceBuilder bt(CHECK); // creates a backtrace
1668 set_backtrace(throwable(), bt.backtrace());
1669 }
1670
1671
1672 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1673 // Fill in stack trace into preallocated backtrace (no GC)
1674
1675 // No-op if stack trace is disabled
1676 if (!StackTraceInThrowable) return;
1677
1678 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1679
1680 JavaThread* THREAD = JavaThread::current();
1681
1682 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1683 assert(backtrace.not_null(), "backtrace should have been preallocated");
1684
1685 ResourceMark rm(THREAD);
1686 vframeStream st(THREAD);
1687
1688 BacktraceBuilder bt(backtrace);
1689
1690 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1691 // methods as preallocated errors aren't created by "java" code.
1692
1693 // fill in as much stack trace as possible
1694 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1695 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1696 int chunk_count = 0;
1697
1698 for (;!st.at_end(); st.next()) {
1699 bt.push(st.method(), st.bci(), CHECK);
1700 chunk_count++;
1701
1702 // Bail-out for deep stacks
1703 if (chunk_count >= max_chunks) break;
1704 }
1705
1706 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1707 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1708 // can be removed in a JDK using this JVM version
1709 if (JDK_Version::is_gte_jdk17x_version()) {
1710 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1711 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1712 }
1713 }
1714
1715
1716 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1717 if (throwable == NULL) {
1718 THROW_0(vmSymbols::java_lang_NullPointerException());
1719 }
1720 objArrayOop chunk = objArrayOop(backtrace(throwable));
1721 int depth = 0;
1722 if (chunk != NULL) {
1723 // Iterate over chunks and count full ones
1724 while (true) {
1725 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1726 if (next == NULL) break;
1727 depth += trace_chunk_size;
1728 chunk = next;
1729 }
1730 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1731 // Count element in remaining partial chunk. NULL value for mirror
1732 // marks the end of the stack trace elements that are saved.
1733 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1734 assert(mirrors != NULL, "sanity check");
1735 for (int i = 0; i < mirrors->length(); i++) {
1736 if (mirrors->obj_at(i) == NULL) break;
1737 depth++;
1738 }
1739 }
1740 return depth;
1741 }
1742
1743
1744 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1745 if (throwable == NULL) {
1746 THROW_0(vmSymbols::java_lang_NullPointerException());
1747 }
1748 if (index < 0) {
1749 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1750 }
1751 // Compute how many chunks to skip and index into actual chunk
1752 objArrayOop chunk = objArrayOop(backtrace(throwable));
1753 int skip_chunks = index / trace_chunk_size;
1754 int chunk_index = index % trace_chunk_size;
1755 while (chunk != NULL && skip_chunks > 0) {
1756 chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1757 skip_chunks--;
1758 }
1759 if (chunk == NULL) {
1760 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1761 }
1762 // Get method id, bci, version and mirror from chunk
1763 typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1764 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1765 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1766
1767 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1768
1769 int method = methods->short_at(chunk_index);
1770 int version = version_at(bcis->int_at(chunk_index));
1771 int bci = bci_at(bcis->int_at(chunk_index));
1772 Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1773
1774 // Chunk can be partial full
1775 if (mirror.is_null()) {
1776 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1777 }
1778
1779 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0);
1780 return element;
1781 }
1782
1783 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1784 int version, int bci, TRAPS) {
1785 // Allocate java.lang.StackTraceElement instance
1786 Klass* k = SystemDictionary::StackTraceElement_klass();
1787 assert(k != NULL, "must be loaded in 1.4+");
1788 instanceKlassHandle ik (THREAD, k);
1789 if (ik->should_be_initialized()) {
1790 ik->initialize(CHECK_0);
1791 }
1792
1793 Handle element = ik->allocate_instance_handle(CHECK_0);
1794 // Fill in class name
1795 ResourceMark rm(THREAD);
1796 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1797 const char* str = holder->external_name();
1798 oop classname = StringTable::intern((char*) str, CHECK_0);
1799 java_lang_StackTraceElement::set_declaringClass(element(), classname);
1800
1801 Method* method = holder->method_with_idnum(method_id);
1802 // Method on stack may be obsolete because it was redefined so cannot be
1803 // found by idnum.
1804 if (method == NULL) {
1805 // leave name and fileName null
1806 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1807 return element();
1808 }
1809
1810 // Fill in method name
1811 oop methodname = StringTable::intern(method->name(), CHECK_0);
1812 java_lang_StackTraceElement::set_methodName(element(), methodname);
1813
1814 if (!version_matches(method, version)) {
1815 // The method was redefined, accurate line number information isn't available
1816 java_lang_StackTraceElement::set_fileName(element(), NULL);
1817 java_lang_StackTraceElement::set_lineNumber(element(), -1);
1818 } else {
1819 // Fill in source file name and line number.
1820 Symbol* source = holder->source_file_name();
1821 if (ShowHiddenFrames && source == NULL)
1822 source = vmSymbols::unknown_class_name();
1823 oop filename = StringTable::intern(source, CHECK_0);
1824 java_lang_StackTraceElement::set_fileName(element(), filename);
1825
1826 int line_number = get_line_number(method, bci);
1827 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1828 }
1829 return element();
1830 }
1831
1832 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1833 Handle mirror (THREAD, method->method_holder()->java_mirror());
1834 int method_id = method->method_idnum();
1835 return create(mirror, method_id, method->constants()->version(), bci, THREAD);
1836 }
1837
1838 void java_lang_reflect_AccessibleObject::compute_offsets() {
1839 Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1840 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1841 }
1842
1843 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1845 return (jboolean) reflect->bool_field(override_offset);
1846 }
1847
1848 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1849 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1850 reflect->bool_field_put(override_offset, (int) value);
1851 }
1852
1853 void java_lang_reflect_Method::compute_offsets() {
1854 Klass* k = SystemDictionary::reflect_Method_klass();
1855 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
1856 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1857 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
1858 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1859 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1860 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
1861 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
1862 // The generic signature and annotations fields are only present in 1.5
1863 signature_offset = -1;
1864 annotations_offset = -1;
1865 parameter_annotations_offset = -1;
1866 annotation_default_offset = -1;
1867 type_annotations_offset = -1;
1868 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
1869 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
1870 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1871 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
1872 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
1873 }
1874
1875 Handle java_lang_reflect_Method::create(TRAPS) {
1876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1877 Klass* klass = SystemDictionary::reflect_Method_klass();
1878 // This class is eagerly initialized during VM initialization, since we keep a refence
1879 // to one of the methods
1880 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1881 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH);
1882 }
1883
1884 oop java_lang_reflect_Method::clazz(oop reflect) {
1885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1886 return reflect->obj_field(clazz_offset);
1887 }
1888
1889 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1891 reflect->obj_field_put(clazz_offset, value);
1892 }
1893
1894 int java_lang_reflect_Method::slot(oop reflect) {
1895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1896 return reflect->int_field(slot_offset);
1897 }
1898
1899 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1901 reflect->int_field_put(slot_offset, value);
1902 }
1903
1904 oop java_lang_reflect_Method::name(oop method) {
1905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1906 return method->obj_field(name_offset);
1907 }
1908
1909 void java_lang_reflect_Method::set_name(oop method, oop value) {
1910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1911 method->obj_field_put(name_offset, value);
1912 }
1913
1914 oop java_lang_reflect_Method::return_type(oop method) {
1915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1916 return method->obj_field(returnType_offset);
1917 }
1918
1919 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1921 method->obj_field_put(returnType_offset, value);
1922 }
1923
1924 oop java_lang_reflect_Method::parameter_types(oop method) {
1925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1926 return method->obj_field(parameterTypes_offset);
1927 }
1928
1929 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
1930 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1931 method->obj_field_put(parameterTypes_offset, value);
1932 }
1933
1934 oop java_lang_reflect_Method::exception_types(oop method) {
1935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1936 return method->obj_field(exceptionTypes_offset);
1937 }
1938
1939 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
1940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1941 method->obj_field_put(exceptionTypes_offset, value);
1942 }
1943
1944 int java_lang_reflect_Method::modifiers(oop method) {
1945 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1946 return method->int_field(modifiers_offset);
1947 }
1948
1949 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
1950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1951 method->int_field_put(modifiers_offset, value);
1952 }
1953
1954 bool java_lang_reflect_Method::has_signature_field() {
1955 return (signature_offset >= 0);
1956 }
1957
1958 oop java_lang_reflect_Method::signature(oop method) {
1959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1960 assert(has_signature_field(), "signature field must be present");
1961 return method->obj_field(signature_offset);
1962 }
1963
1964 void java_lang_reflect_Method::set_signature(oop method, oop value) {
1965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1966 assert(has_signature_field(), "signature field must be present");
1967 method->obj_field_put(signature_offset, value);
1968 }
1969
1970 bool java_lang_reflect_Method::has_annotations_field() {
1971 return (annotations_offset >= 0);
1972 }
1973
1974 oop java_lang_reflect_Method::annotations(oop method) {
1975 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1976 assert(has_annotations_field(), "annotations field must be present");
1977 return method->obj_field(annotations_offset);
1978 }
1979
1980 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
1981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1982 assert(has_annotations_field(), "annotations field must be present");
1983 method->obj_field_put(annotations_offset, value);
1984 }
1985
1986 bool java_lang_reflect_Method::has_parameter_annotations_field() {
1987 return (parameter_annotations_offset >= 0);
1988 }
1989
1990 oop java_lang_reflect_Method::parameter_annotations(oop method) {
1991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1992 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1993 return method->obj_field(parameter_annotations_offset);
1994 }
1995
1996 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
1997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1998 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
1999 method->obj_field_put(parameter_annotations_offset, value);
2000 }
2001
2002 bool java_lang_reflect_Method::has_annotation_default_field() {
2003 return (annotation_default_offset >= 0);
2004 }
2005
2006 oop java_lang_reflect_Method::annotation_default(oop method) {
2007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2008 assert(has_annotation_default_field(), "annotation default field must be present");
2009 return method->obj_field(annotation_default_offset);
2010 }
2011
2012 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2014 assert(has_annotation_default_field(), "annotation default field must be present");
2015 method->obj_field_put(annotation_default_offset, value);
2016 }
2017
2018 bool java_lang_reflect_Method::has_type_annotations_field() {
2019 return (type_annotations_offset >= 0);
2020 }
2021
2022 oop java_lang_reflect_Method::type_annotations(oop method) {
2023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2024 assert(has_type_annotations_field(), "type_annotations field must be present");
2025 return method->obj_field(type_annotations_offset);
2026 }
2027
2028 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2030 assert(has_type_annotations_field(), "type_annotations field must be present");
2031 method->obj_field_put(type_annotations_offset, value);
2032 }
2033
2034 void java_lang_reflect_Constructor::compute_offsets() {
2035 Klass* k = SystemDictionary::reflect_Constructor_klass();
2036 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2037 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2038 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2039 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2040 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2041 // The generic signature and annotations fields are only present in 1.5
2042 signature_offset = -1;
2043 annotations_offset = -1;
2044 parameter_annotations_offset = -1;
2045 type_annotations_offset = -1;
2046 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2047 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2048 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2049 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2050 }
2051
2052 Handle java_lang_reflect_Constructor::create(TRAPS) {
2053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2054 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2055 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2056 instanceKlassHandle klass (THREAD, k);
2057 // Ensure it is initialized
2058 klass->initialize(CHECK_NH);
2059 return klass->allocate_instance_handle(CHECK_NH);
2060 }
2061
2062 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2064 return reflect->obj_field(clazz_offset);
2065 }
2066
2067 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2069 reflect->obj_field_put(clazz_offset, value);
2070 }
2071
2072 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2074 return constructor->obj_field(parameterTypes_offset);
2075 }
2076
2077 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2079 constructor->obj_field_put(parameterTypes_offset, value);
2080 }
2081
2082 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2084 return constructor->obj_field(exceptionTypes_offset);
2085 }
2086
2087 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2089 constructor->obj_field_put(exceptionTypes_offset, value);
2090 }
2091
2092 int java_lang_reflect_Constructor::slot(oop reflect) {
2093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2094 return reflect->int_field(slot_offset);
2095 }
2096
2097 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2099 reflect->int_field_put(slot_offset, value);
2100 }
2101
2102 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2104 return constructor->int_field(modifiers_offset);
2105 }
2106
2107 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2109 constructor->int_field_put(modifiers_offset, value);
2110 }
2111
2112 bool java_lang_reflect_Constructor::has_signature_field() {
2113 return (signature_offset >= 0);
2114 }
2115
2116 oop java_lang_reflect_Constructor::signature(oop constructor) {
2117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2118 assert(has_signature_field(), "signature field must be present");
2119 return constructor->obj_field(signature_offset);
2120 }
2121
2122 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2124 assert(has_signature_field(), "signature field must be present");
2125 constructor->obj_field_put(signature_offset, value);
2126 }
2127
2128 bool java_lang_reflect_Constructor::has_annotations_field() {
2129 return (annotations_offset >= 0);
2130 }
2131
2132 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2134 assert(has_annotations_field(), "annotations field must be present");
2135 return constructor->obj_field(annotations_offset);
2136 }
2137
2138 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2140 assert(has_annotations_field(), "annotations field must be present");
2141 constructor->obj_field_put(annotations_offset, value);
2142 }
2143
2144 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2145 return (parameter_annotations_offset >= 0);
2146 }
2147
2148 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2150 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2151 return method->obj_field(parameter_annotations_offset);
2152 }
2153
2154 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2155 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2156 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2157 method->obj_field_put(parameter_annotations_offset, value);
2158 }
2159
2160 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2161 return (type_annotations_offset >= 0);
2162 }
2163
2164 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2165 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2166 assert(has_type_annotations_field(), "type_annotations field must be present");
2167 return constructor->obj_field(type_annotations_offset);
2168 }
2169
2170 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2172 assert(has_type_annotations_field(), "type_annotations field must be present");
2173 constructor->obj_field_put(type_annotations_offset, value);
2174 }
2175
2176 void java_lang_reflect_Field::compute_offsets() {
2177 Klass* k = SystemDictionary::reflect_Field_klass();
2178 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2179 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2180 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2181 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2182 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2183 // The generic signature and annotations fields are only present in 1.5
2184 signature_offset = -1;
2185 annotations_offset = -1;
2186 type_annotations_offset = -1;
2187 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2188 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2189 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2190 }
2191
2192 Handle java_lang_reflect_Field::create(TRAPS) {
2193 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2194 Symbol* name = vmSymbols::java_lang_reflect_Field();
2195 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2196 instanceKlassHandle klass (THREAD, k);
2197 // Ensure it is initialized
2198 klass->initialize(CHECK_NH);
2199 return klass->allocate_instance_handle(CHECK_NH);
2200 }
2201
2202 oop java_lang_reflect_Field::clazz(oop reflect) {
2203 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2204 return reflect->obj_field(clazz_offset);
2205 }
2206
2207 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2208 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2209 reflect->obj_field_put(clazz_offset, value);
2210 }
2211
2212 oop java_lang_reflect_Field::name(oop field) {
2213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2214 return field->obj_field(name_offset);
2215 }
2216
2217 void java_lang_reflect_Field::set_name(oop field, oop value) {
2218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2219 field->obj_field_put(name_offset, value);
2220 }
2221
2222 oop java_lang_reflect_Field::type(oop field) {
2223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2224 return field->obj_field(type_offset);
2225 }
2226
2227 void java_lang_reflect_Field::set_type(oop field, oop value) {
2228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2229 field->obj_field_put(type_offset, value);
2230 }
2231
2232 int java_lang_reflect_Field::slot(oop reflect) {
2233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2234 return reflect->int_field(slot_offset);
2235 }
2236
2237 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2239 reflect->int_field_put(slot_offset, value);
2240 }
2241
2242 int java_lang_reflect_Field::modifiers(oop field) {
2243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2244 return field->int_field(modifiers_offset);
2245 }
2246
2247 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2249 field->int_field_put(modifiers_offset, value);
2250 }
2251
2252 bool java_lang_reflect_Field::has_signature_field() {
2253 return (signature_offset >= 0);
2254 }
2255
2256 oop java_lang_reflect_Field::signature(oop field) {
2257 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2258 assert(has_signature_field(), "signature field must be present");
2259 return field->obj_field(signature_offset);
2260 }
2261
2262 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2264 assert(has_signature_field(), "signature field must be present");
2265 field->obj_field_put(signature_offset, value);
2266 }
2267
2268 bool java_lang_reflect_Field::has_annotations_field() {
2269 return (annotations_offset >= 0);
2270 }
2271
2272 oop java_lang_reflect_Field::annotations(oop field) {
2273 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2274 assert(has_annotations_field(), "annotations field must be present");
2275 return field->obj_field(annotations_offset);
2276 }
2277
2278 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2279 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2280 assert(has_annotations_field(), "annotations field must be present");
2281 field->obj_field_put(annotations_offset, value);
2282 }
2283
2284 bool java_lang_reflect_Field::has_type_annotations_field() {
2285 return (type_annotations_offset >= 0);
2286 }
2287
2288 oop java_lang_reflect_Field::type_annotations(oop field) {
2289 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2290 assert(has_type_annotations_field(), "type_annotations field must be present");
2291 return field->obj_field(type_annotations_offset);
2292 }
2293
2294 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2295 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2296 assert(has_type_annotations_field(), "type_annotations field must be present");
2297 field->obj_field_put(type_annotations_offset, value);
2298 }
2299
2300 void sun_reflect_ConstantPool::compute_offsets() {
2301 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2302 // This null test can be removed post beta
2303 if (k != NULL) {
2304 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2305 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2306 }
2307 }
2308
2309 void java_lang_reflect_Parameter::compute_offsets() {
2310 Klass* k = SystemDictionary::reflect_Parameter_klass();
2311 if(NULL != k) {
2312 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2313 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2314 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2315 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2316 }
2317 }
2318
2319 Handle java_lang_reflect_Parameter::create(TRAPS) {
2320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2321 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2322 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2323 instanceKlassHandle klass (THREAD, k);
2324 // Ensure it is initialized
2325 klass->initialize(CHECK_NH);
2326 return klass->allocate_instance_handle(CHECK_NH);
2327 }
2328
2329 oop java_lang_reflect_Parameter::name(oop param) {
2330 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2331 return param->obj_field(name_offset);
2332 }
2333
2334 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2336 param->obj_field_put(name_offset, value);
2337 }
2338
2339 int java_lang_reflect_Parameter::modifiers(oop param) {
2340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2341 return param->int_field(modifiers_offset);
2342 }
2343
2344 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2346 param->int_field_put(modifiers_offset, value);
2347 }
2348
2349 int java_lang_reflect_Parameter::index(oop param) {
2350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2351 return param->int_field(index_offset);
2352 }
2353
2354 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2355 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2356 param->int_field_put(index_offset, value);
2357 }
2358
2359 oop java_lang_reflect_Parameter::executable(oop param) {
2360 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2361 return param->obj_field(executable_offset);
2362 }
2363
2364 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2366 param->obj_field_put(executable_offset, value);
2367 }
2368
2369
2370 Handle sun_reflect_ConstantPool::create(TRAPS) {
2371 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2372 Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2373 instanceKlassHandle klass (THREAD, k);
2374 // Ensure it is initialized
2375 klass->initialize(CHECK_NH);
2376 return klass->allocate_instance_handle(CHECK_NH);
2377 }
2378
2379
2380 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2381 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2382 oop mirror = value->pool_holder()->java_mirror();
2383 // Save the mirror to get back the constant pool.
2384 reflect->obj_field_put(_oop_offset, mirror);
2385 }
2386
2387 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2388 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2389
2390 oop mirror = reflect->obj_field(_oop_offset);
2391 Klass* k = java_lang_Class::as_Klass(mirror);
2392 assert(k->oop_is_instance(), "Must be");
2393
2394 // Get the constant pool back from the klass. Since class redefinition
2395 // merges the new constant pool into the old, this is essentially the
2396 // same constant pool as the original. If constant pool merging is
2397 // no longer done in the future, this will have to change to save
2398 // the original.
2399 return InstanceKlass::cast(k)->constants();
2400 }
2401
2402 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2403 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2404 // This null test can be removed post beta
2405 if (k != NULL) {
2406 compute_offset(_base_offset, k,
2407 vmSymbols::base_name(), vmSymbols::object_signature());
2408 }
2409 }
2410
2411 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2412 Klass* k = SystemDictionary::box_klass(type);
2413 if (k == NULL) return NULL;
2414 instanceKlassHandle h (THREAD, k);
2415 if (!h->is_initialized()) h->initialize(CHECK_0);
2416 return h->allocate_instance(THREAD);
2417 }
2418
2419
2420 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2421 oop box = initialize_and_allocate(type, CHECK_0);
2422 if (box == NULL) return NULL;
2423 switch (type) {
2424 case T_BOOLEAN:
2425 box->bool_field_put(value_offset, value->z);
2426 break;
2427 case T_CHAR:
2428 box->char_field_put(value_offset, value->c);
2429 break;
2430 case T_FLOAT:
2431 box->float_field_put(value_offset, value->f);
2432 break;
2433 case T_DOUBLE:
2434 box->double_field_put(long_value_offset, value->d);
2435 break;
2436 case T_BYTE:
2437 box->byte_field_put(value_offset, value->b);
2438 break;
2439 case T_SHORT:
2440 box->short_field_put(value_offset, value->s);
2441 break;
2442 case T_INT:
2443 box->int_field_put(value_offset, value->i);
2444 break;
2445 case T_LONG:
2446 box->long_field_put(long_value_offset, value->j);
2447 break;
2448 default:
2449 return NULL;
2450 }
2451 return box;
2452 }
2453
2454
2455 BasicType java_lang_boxing_object::basic_type(oop box) {
2456 if (box == NULL) return T_ILLEGAL;
2457 BasicType type = SystemDictionary::box_klass_type(box->klass());
2458 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2459 return T_ILLEGAL;
2460 return type;
2461 }
2462
2463
2464 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2465 BasicType type = SystemDictionary::box_klass_type(box->klass());
2466 switch (type) {
2467 case T_BOOLEAN:
2468 value->z = box->bool_field(value_offset);
2469 break;
2470 case T_CHAR:
2471 value->c = box->char_field(value_offset);
2472 break;
2473 case T_FLOAT:
2474 value->f = box->float_field(value_offset);
2475 break;
2476 case T_DOUBLE:
2477 value->d = box->double_field(long_value_offset);
2478 break;
2479 case T_BYTE:
2480 value->b = box->byte_field(value_offset);
2481 break;
2482 case T_SHORT:
2483 value->s = box->short_field(value_offset);
2484 break;
2485 case T_INT:
2486 value->i = box->int_field(value_offset);
2487 break;
2488 case T_LONG:
2489 value->j = box->long_field(long_value_offset);
2490 break;
2491 default:
2492 return T_ILLEGAL;
2493 } // end switch
2494 return type;
2495 }
2496
2497
2498 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2499 BasicType type = SystemDictionary::box_klass_type(box->klass());
2500 switch (type) {
2501 case T_BOOLEAN:
2502 box->bool_field_put(value_offset, value->z);
2503 break;
2504 case T_CHAR:
2505 box->char_field_put(value_offset, value->c);
2506 break;
2507 case T_FLOAT:
2508 box->float_field_put(value_offset, value->f);
2509 break;
2510 case T_DOUBLE:
2511 box->double_field_put(long_value_offset, value->d);
2512 break;
2513 case T_BYTE:
2514 box->byte_field_put(value_offset, value->b);
2515 break;
2516 case T_SHORT:
2517 box->short_field_put(value_offset, value->s);
2518 break;
2519 case T_INT:
2520 box->int_field_put(value_offset, value->i);
2521 break;
2522 case T_LONG:
2523 box->long_field_put(long_value_offset, value->j);
2524 break;
2525 default:
2526 return T_ILLEGAL;
2527 } // end switch
2528 return type;
2529 }
2530
2531
2532 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2533 switch (type) {
2534 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
2535 case T_CHAR: st->print("%d", value->c); break;
2536 case T_BYTE: st->print("%d", value->b); break;
2537 case T_SHORT: st->print("%d", value->s); break;
2538 case T_INT: st->print("%d", value->i); break;
2539 case T_LONG: st->print(INT64_FORMAT, value->j); break;
2540 case T_FLOAT: st->print("%f", value->f); break;
2541 case T_DOUBLE: st->print("%lf", value->d); break;
2542 default: st->print("type %d?", type); break;
2543 }
2544 }
2545
2546
2547 // Support for java_lang_ref_Reference
2548 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2549 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2550 address addr = ik->static_field_addr(static_lock_offset);
2551 return (HeapWord*) addr;
2552 }
2553
2554 oop java_lang_ref_Reference::pending_list_lock() {
2555 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2556 address addr = ik->static_field_addr(static_lock_offset);
2557 if (UseCompressedOops) {
2558 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2559 } else {
2560 return oopDesc::load_decode_heap_oop((oop*)addr);
2561 }
2562 }
2563
2564 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2565 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2566 address addr = ik->static_field_addr(static_pending_offset);
2567 // XXX This might not be HeapWord aligned, almost rather be char *.
2568 return (HeapWord*)addr;
2569 }
2570
2571 oop java_lang_ref_Reference::pending_list() {
2572 char *addr = (char *)pending_list_addr();
2573 if (UseCompressedOops) {
2574 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2575 } else {
2576 return oopDesc::load_decode_heap_oop((oop*)addr);
2577 }
2578 }
2579
2580
2581 // Support for java_lang_ref_SoftReference
2582
2583 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2584 return ref->long_field(timestamp_offset);
2585 }
2586
2587 jlong java_lang_ref_SoftReference::clock() {
2588 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2589 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2590 return *offset;
2591 }
2592
2593 void java_lang_ref_SoftReference::set_clock(jlong value) {
2594 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2595 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2596 *offset = value;
2597 }
2598
2599 // Support for java_lang_invoke_DirectMethodHandle
2600
2601 int java_lang_invoke_DirectMethodHandle::_member_offset;
2602
2603 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2604 oop member_name = NULL;
2605 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2606 assert(is_dmh, "a DirectMethodHandle oop is expected");
2607 if (is_dmh) {
2608 member_name = dmh->obj_field(member_offset_in_bytes());
2609 }
2610 return member_name;
2611 }
2612
2613 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2614 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2615 if (klass_oop != NULL && EnableInvokeDynamic) {
2616 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2617 }
2618 }
2619
2620 // Support for java_lang_invoke_MethodHandle
2621
2622 int java_lang_invoke_MethodHandle::_type_offset;
2623 int java_lang_invoke_MethodHandle::_form_offset;
2624
2625 int java_lang_invoke_MemberName::_clazz_offset;
2626 int java_lang_invoke_MemberName::_name_offset;
2627 int java_lang_invoke_MemberName::_type_offset;
2628 int java_lang_invoke_MemberName::_flags_offset;
2629 int java_lang_invoke_MemberName::_vmtarget_offset;
2630 int java_lang_invoke_MemberName::_vmloader_offset;
2631 int java_lang_invoke_MemberName::_vmindex_offset;
2632
2633 int java_lang_invoke_LambdaForm::_vmentry_offset;
2634
2635 void java_lang_invoke_MethodHandle::compute_offsets() {
2636 Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2637 if (klass_oop != NULL && EnableInvokeDynamic) {
2638 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2639 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2640 if (_form_offset == 0) {
2641 EnableInvokeDynamic = false;
2642 }
2643 }
2644 }
2645
2646 void java_lang_invoke_MemberName::compute_offsets() {
2647 Klass* klass_oop = SystemDictionary::MemberName_klass();
2648 if (klass_oop != NULL && EnableInvokeDynamic) {
2649 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature());
2650 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature());
2651 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature());
2652 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature());
2653 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2654 }
2655 }
2656
2657 void java_lang_invoke_LambdaForm::compute_offsets() {
2658 Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2659 if (klass_oop != NULL && EnableInvokeDynamic) {
2660 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2661 }
2662 }
2663
2664 oop java_lang_invoke_MethodHandle::type(oop mh) {
2665 return mh->obj_field(_type_offset);
2666 }
2667
2668 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2669 mh->obj_field_put(_type_offset, mtype);
2670 }
2671
2672 oop java_lang_invoke_MethodHandle::form(oop mh) {
2673 assert(_form_offset != 0, "");
2674 return mh->obj_field(_form_offset);
2675 }
2676
2677 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2678 assert(_form_offset != 0, "");
2679 mh->obj_field_put(_form_offset, lform);
2680 }
2681
2682 /// MemberName accessors
2683
2684 oop java_lang_invoke_MemberName::clazz(oop mname) {
2685 assert(is_instance(mname), "wrong type");
2686 return mname->obj_field(_clazz_offset);
2687 }
2688
2689 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2690 assert(is_instance(mname), "wrong type");
2691 mname->obj_field_put(_clazz_offset, clazz);
2692 }
2693
2694 oop java_lang_invoke_MemberName::name(oop mname) {
2695 assert(is_instance(mname), "wrong type");
2696 return mname->obj_field(_name_offset);
2697 }
2698
2699 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2700 assert(is_instance(mname), "wrong type");
2701 mname->obj_field_put(_name_offset, name);
2702 }
2703
2704 oop java_lang_invoke_MemberName::type(oop mname) {
2705 assert(is_instance(mname), "wrong type");
2706 return mname->obj_field(_type_offset);
2707 }
2708
2709 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2710 assert(is_instance(mname), "wrong type");
2711 mname->obj_field_put(_type_offset, type);
2712 }
2713
2714 int java_lang_invoke_MemberName::flags(oop mname) {
2715 assert(is_instance(mname), "wrong type");
2716 return mname->int_field(_flags_offset);
2717 }
2718
2719 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2720 assert(is_instance(mname), "wrong type");
2721 mname->int_field_put(_flags_offset, flags);
2722 }
2723
2724 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2725 assert(is_instance(mname), "wrong type");
2726 return (Metadata*)mname->address_field(_vmtarget_offset);
2727 }
2728
2729 #if INCLUDE_JVMTI
2730 // Can be executed on VM thread only
2731 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) {
2732 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type");
2733 assert(Thread::current()->is_VM_thread(), "not VM thread");
2734 mname->address_field_put(_vmtarget_offset, (address)ref);
2735 }
2736 #endif // INCLUDE_JVMTI
2737
2738 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2739 assert(is_instance(mname), "wrong type");
2740 // check the type of the vmtarget
2741 oop dependency = NULL;
2742 if (ref != NULL) {
2743 switch (flags(mname) & (MN_IS_METHOD |
2744 MN_IS_CONSTRUCTOR |
2745 MN_IS_FIELD)) {
2746 case MN_IS_METHOD:
2747 case MN_IS_CONSTRUCTOR:
2748 assert(ref->is_method(), "should be a method");
2749 dependency = ((Method*)ref)->method_holder()->java_mirror();
2750 break;
2751 case MN_IS_FIELD:
2752 assert(ref->is_klass(), "should be a class");
2753 dependency = ((Klass*)ref)->java_mirror();
2754 break;
2755 default:
2756 ShouldNotReachHere();
2757 }
2758 }
2759 mname->address_field_put(_vmtarget_offset, (address)ref);
2760 // Add a reference to the loader (actually mirror because anonymous classes will not have
2761 // distinct loaders) to ensure the metadata is kept alive
2762 // This mirror may be different than the one in clazz field.
2763 mname->obj_field_put(_vmloader_offset, dependency);
2764 }
2765
2766 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2767 assert(is_instance(mname), "wrong type");
2768 return (intptr_t) mname->address_field(_vmindex_offset);
2769 }
2770
2771 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2772 assert(is_instance(mname), "wrong type");
2773 mname->address_field_put(_vmindex_offset, (address) index);
2774 }
2775
2776 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2777 assert(is_instance(lform), "wrong type");
2778 return lform->obj_field(_vmentry_offset);
2779 }
2780
2781
2782 // Support for java_lang_invoke_MethodType
2783
2784 int java_lang_invoke_MethodType::_rtype_offset;
2785 int java_lang_invoke_MethodType::_ptypes_offset;
2786
2787 void java_lang_invoke_MethodType::compute_offsets() {
2788 Klass* k = SystemDictionary::MethodType_klass();
2789 if (k != NULL) {
2790 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature());
2791 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2792 }
2793 }
2794
2795 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2796 st->print("(");
2797 objArrayOop pts = ptypes(mt);
2798 for (int i = 0, limit = pts->length(); i < limit; i++) {
2799 java_lang_Class::print_signature(pts->obj_at(i), st);
2800 }
2801 st->print(")");
2802 java_lang_Class::print_signature(rtype(mt), st);
2803 }
2804
2805 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2806 ResourceMark rm;
2807 stringStream buffer(128);
2808 print_signature(mt, &buffer);
2809 const char* sigstr = buffer.base();
2810 int siglen = (int) buffer.size();
2811 Symbol *name;
2812 if (!intern_if_not_found) {
2813 name = SymbolTable::probe(sigstr, siglen);
2814 } else {
2815 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2816 }
2817 return name;
2818 }
2819
2820 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2821 if (mt1 == mt2)
2822 return true;
2823 if (rtype(mt1) != rtype(mt2))
2824 return false;
2825 if (ptype_count(mt1) != ptype_count(mt2))
2826 return false;
2827 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2828 if (ptype(mt1, i) != ptype(mt2, i))
2829 return false;
2830 }
2831 return true;
2832 }
2833
2834 oop java_lang_invoke_MethodType::rtype(oop mt) {
2835 assert(is_instance(mt), "must be a MethodType");
2836 return mt->obj_field(_rtype_offset);
2837 }
2838
2839 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2840 assert(is_instance(mt), "must be a MethodType");
2841 return (objArrayOop) mt->obj_field(_ptypes_offset);
2842 }
2843
2844 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2845 return ptypes(mt)->obj_at(idx);
2846 }
2847
2848 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2849 return ptypes(mt)->length();
2850 }
2851
2852 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2853 objArrayOop pts = ptypes(mt);
2854 int count = pts->length();
2855 int slots = 0;
2856 for (int i = 0; i < count; i++) {
2857 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2858 slots += type2size[bt];
2859 }
2860 return slots;
2861 }
2862
2863 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2864 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2865 return type2size[bt];
2866 }
2867
2868
2869 // Support for java_lang_invoke_CallSite
2870
2871 int java_lang_invoke_CallSite::_target_offset;
2872
2873 void java_lang_invoke_CallSite::compute_offsets() {
2874 if (!EnableInvokeDynamic) return;
2875 Klass* k = SystemDictionary::CallSite_klass();
2876 if (k != NULL) {
2877 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2878 }
2879 }
2880
2881
2882 // Support for java_security_AccessControlContext
2883
2884 int java_security_AccessControlContext::_context_offset = 0;
2885 int java_security_AccessControlContext::_privilegedContext_offset = 0;
2886 int java_security_AccessControlContext::_isPrivileged_offset = 0;
2887 int java_security_AccessControlContext::_isAuthorized_offset = -1;
2888
2889 void java_security_AccessControlContext::compute_offsets() {
2890 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
2891 fieldDescriptor fd;
2892 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
2893
2894 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
2895 fatal("Invalid layout of java.security.AccessControlContext");
2896 }
2897 _context_offset = fd.offset();
2898
2899 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
2900 fatal("Invalid layout of java.security.AccessControlContext");
2901 }
2902 _privilegedContext_offset = fd.offset();
2903
2904 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
2905 fatal("Invalid layout of java.security.AccessControlContext");
2906 }
2907 _isPrivileged_offset = fd.offset();
2908
2909 // The offset may not be present for bootstrapping with older JDK.
2910 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
2911 _isAuthorized_offset = fd.offset();
2912 }
2913 }
2914
2915
2916 bool java_security_AccessControlContext::is_authorized(Handle context) {
2917 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
2918 assert(_isAuthorized_offset != -1, "should be set");
2919 return context->bool_field(_isAuthorized_offset) != 0;
2920 }
2921
2922 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
2923 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
2924 // Ensure klass is initialized
2925 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
2926 // Allocate result
2927 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
2928 // Fill in values
2929 result->obj_field_put(_context_offset, context());
2930 result->obj_field_put(_privilegedContext_offset, privileged_context());
2931 result->bool_field_put(_isPrivileged_offset, isPrivileged);
2932 // whitelist AccessControlContexts created by the JVM if present
2933 if (_isAuthorized_offset != -1) {
2934 result->bool_field_put(_isAuthorized_offset, true);
2935 }
2936 return result;
2937 }
2938
2939
2940 // Support for java_lang_ClassLoader
2941
2942 bool java_lang_ClassLoader::offsets_computed = false;
2943 int java_lang_ClassLoader::_loader_data_offset = -1;
2944 int java_lang_ClassLoader::parallelCapable_offset = -1;
2945
2946 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
2947 assert(loader != NULL && loader->is_oop(), "loader must be oop");
2948 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
2949 }
2950
2951 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
2952 return *java_lang_ClassLoader::loader_data_addr(loader);
2953 }
2954
2955 void java_lang_ClassLoader::compute_offsets() {
2956 assert(!offsets_computed, "offsets should be initialized only once");
2957 offsets_computed = true;
2958
2959 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
2960 Klass* k1 = SystemDictionary::ClassLoader_klass();
2961 compute_optional_offset(parallelCapable_offset,
2962 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
2963
2964 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2965 }
2966
2967 oop java_lang_ClassLoader::parent(oop loader) {
2968 assert(is_instance(loader), "loader must be oop");
2969 return loader->obj_field(parent_offset);
2970 }
2971
2972 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
2973 assert(is_instance(loader), "loader must be oop");
2974 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
2975 oop acl = loader;
2976 debug_only(jint loop_count = 0);
2977 // This loop taken verbatim from ClassLoader.java:
2978 do {
2979 acl = parent(acl);
2980 if (cl == acl) {
2981 return true;
2982 }
2983 assert(++loop_count > 0, "loop_count overflow");
2984 } while (acl != NULL);
2985 return false;
2986 }
2987
2988
2989 // For class loader classes, parallelCapable defined
2990 // based on non-null field
2991 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
2992 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
2993 if (!JDK_Version::is_gte_jdk17x_version()
2994 || parallelCapable_offset == -1) {
2995 // Default for backward compatibility is false
2996 return false;
2997 }
2998 return (class_loader->obj_field(parallelCapable_offset) != NULL);
2999 }
3000
3001 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3002 // Fix for 4474172; see evaluation for more details
3003 loader = non_reflection_class_loader(loader);
3004
3005 oop cl = SystemDictionary::java_system_loader();
3006 while(cl != NULL) {
3007 if (cl == loader) return true;
3008 cl = parent(cl);
3009 }
3010 return false;
3011 }
3012
3013 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3014 if (loader != NULL) {
3015 // See whether this is one of the class loaders associated with
3016 // the generated bytecodes for reflection, and if so, "magically"
3017 // delegate to its parent to prevent class loading from occurring
3018 // in places where applications using reflection didn't expect it.
3019 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3020 // This might be null in non-1.4 JDKs
3021 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3022 return parent(loader);
3023 }
3024 }
3025 return loader;
3026 }
3027
3028
3029 // Support for java_lang_System
3030 int java_lang_System::in_offset_in_bytes() {
3031 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3032 }
3033
3034
3035 int java_lang_System::out_offset_in_bytes() {
3036 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3037 }
3038
3039
3040 int java_lang_System::err_offset_in_bytes() {
3041 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3042 }
3043
3044
3045 bool java_lang_System::has_security_manager() {
3046 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3047 address addr = ik->static_field_addr(static_security_offset);
3048 if (UseCompressedOops) {
3049 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3050 } else {
3051 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3052 }
3053 }
3054
3055 int java_lang_Class::_klass_offset;
3056 int java_lang_Class::_array_klass_offset;
3057 int java_lang_Class::_oop_size_offset;
3058 int java_lang_Class::_static_oop_field_count_offset;
3059 int java_lang_Class::_protection_domain_offset;
3060 int java_lang_Class::_init_lock_offset;
3061 int java_lang_Class::_signers_offset;
3062 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3063 int java_lang_Throwable::backtrace_offset;
3064 int java_lang_Throwable::detailMessage_offset;
3065 int java_lang_Throwable::cause_offset;
3066 int java_lang_Throwable::stackTrace_offset;
3067 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3068 int java_lang_reflect_AccessibleObject::override_offset;
3069 int java_lang_reflect_Method::clazz_offset;
3070 int java_lang_reflect_Method::name_offset;
3071 int java_lang_reflect_Method::returnType_offset;
3072 int java_lang_reflect_Method::parameterTypes_offset;
3073 int java_lang_reflect_Method::exceptionTypes_offset;
3074 int java_lang_reflect_Method::slot_offset;
3075 int java_lang_reflect_Method::modifiers_offset;
3076 int java_lang_reflect_Method::signature_offset;
3077 int java_lang_reflect_Method::annotations_offset;
3078 int java_lang_reflect_Method::parameter_annotations_offset;
3079 int java_lang_reflect_Method::annotation_default_offset;
3080 int java_lang_reflect_Method::type_annotations_offset;
3081 int java_lang_reflect_Constructor::clazz_offset;
3082 int java_lang_reflect_Constructor::parameterTypes_offset;
3083 int java_lang_reflect_Constructor::exceptionTypes_offset;
3084 int java_lang_reflect_Constructor::slot_offset;
3085 int java_lang_reflect_Constructor::modifiers_offset;
3086 int java_lang_reflect_Constructor::signature_offset;
3087 int java_lang_reflect_Constructor::annotations_offset;
3088 int java_lang_reflect_Constructor::parameter_annotations_offset;
3089 int java_lang_reflect_Constructor::type_annotations_offset;
3090 int java_lang_reflect_Field::clazz_offset;
3091 int java_lang_reflect_Field::name_offset;
3092 int java_lang_reflect_Field::type_offset;
3093 int java_lang_reflect_Field::slot_offset;
3094 int java_lang_reflect_Field::modifiers_offset;
3095 int java_lang_reflect_Field::signature_offset;
3096 int java_lang_reflect_Field::annotations_offset;
3097 int java_lang_reflect_Field::type_annotations_offset;
3098 int java_lang_reflect_Parameter::name_offset;
3099 int java_lang_reflect_Parameter::modifiers_offset;
3100 int java_lang_reflect_Parameter::index_offset;
3101 int java_lang_reflect_Parameter::executable_offset;
3102 int java_lang_boxing_object::value_offset;
3103 int java_lang_boxing_object::long_value_offset;
3104 int java_lang_ref_Reference::referent_offset;
3105 int java_lang_ref_Reference::queue_offset;
3106 int java_lang_ref_Reference::next_offset;
3107 int java_lang_ref_Reference::discovered_offset;
3108 int java_lang_ref_Reference::static_lock_offset;
3109 int java_lang_ref_Reference::static_pending_offset;
3110 int java_lang_ref_Reference::number_of_fake_oop_fields;
3111 int java_lang_ref_SoftReference::timestamp_offset;
3112 int java_lang_ref_SoftReference::static_clock_offset;
3113 int java_lang_ClassLoader::parent_offset;
3114 int java_lang_System::static_in_offset;
3115 int java_lang_System::static_out_offset;
3116 int java_lang_System::static_err_offset;
3117 int java_lang_System::static_security_offset;
3118 int java_lang_StackTraceElement::declaringClass_offset;
3119 int java_lang_StackTraceElement::methodName_offset;
3120 int java_lang_StackTraceElement::fileName_offset;
3121 int java_lang_StackTraceElement::lineNumber_offset;
3122 int java_lang_AssertionStatusDirectives::classes_offset;
3123 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3124 int java_lang_AssertionStatusDirectives::packages_offset;
3125 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3126 int java_lang_AssertionStatusDirectives::deflt_offset;
3127 int java_nio_Buffer::_limit_offset;
3128 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3129 int sun_reflect_ConstantPool::_oop_offset;
3130 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3131
3132
3133 // Support for java_lang_StackTraceElement
3134
3135 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3136 element->obj_field_put(fileName_offset, value);
3137 }
3138
3139 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3140 element->obj_field_put(declaringClass_offset, value);
3141 }
3142
3143 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3144 element->obj_field_put(methodName_offset, value);
3145 }
3146
3147 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3148 element->int_field_put(lineNumber_offset, value);
3149 }
3150
3151
3152 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3153
3154 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3155 o->obj_field_put(classes_offset, val);
3156 }
3157
3158 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3159 o->obj_field_put(classEnabled_offset, val);
3160 }
3161
3162 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3163 o->obj_field_put(packages_offset, val);
3164 }
3165
3166 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3167 o->obj_field_put(packageEnabled_offset, val);
3168 }
3169
3170 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3171 o->bool_field_put(deflt_offset, val);
3172 }
3173
3174
3175 // Support for intrinsification of java.nio.Buffer.checkIndex
3176 int java_nio_Buffer::limit_offset() {
3177 return _limit_offset;
3178 }
3179
3180
3181 void java_nio_Buffer::compute_offsets() {
3182 Klass* k = SystemDictionary::nio_Buffer_klass();
3183 assert(k != NULL, "must be loaded in 1.4+");
3184 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3185 }
3186
3187 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3188 if (_owner_offset != 0) return;
3189
3190 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3191 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3192 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3193 compute_offset(_owner_offset, k,
3194 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3195 }
3196
3197 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3198 assert(_owner_offset != 0, "Must be initialized");
3199 return obj->obj_field(_owner_offset);
3200 }
3201
3202 // Compute hard-coded offsets
3203 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3204 // are not available to determine the offset_of_static_fields.
3205 void JavaClasses::compute_hard_coded_offsets() {
3206 const int x = heapOopSize;
3207 const int header = instanceOopDesc::base_offset_in_bytes();
3208
3209 // Throwable Class
3210 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header;
3211 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3212 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header;
3213 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3214 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x;
3215
3216 // java_lang_boxing_object
3217 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3218 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3219
3220 // java_lang_ref_Reference:
3221 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3222 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3223 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header;
3224 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header;
3225 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x;
3226 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3227 // Artificial fields for java_lang_ref_Reference
3228 // The first field is for the discovered field added in 1.4
3229 java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3230
3231 // java_lang_ref_SoftReference Class
3232 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3233 // Don't multiply static fields because they are always in wordSize units
3234 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3235
3236 // java_lang_ClassLoader
3237 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3238
3239 // java_lang_System
3240 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x;
3241 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3242 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3243 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3244
3245 // java_lang_StackTraceElement
3246 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header;
3247 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3248 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header;
3249 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3250 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3251 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3252 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3253 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3254 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3255
3256 }
3257
3258
3259 // Compute non-hard-coded field offsets of all the classes in this file
3260 void JavaClasses::compute_offsets() {
3261 // java_lang_Class::compute_offsets was called earlier in bootstrap
3262 java_lang_ClassLoader::compute_offsets();
3263 java_lang_Thread::compute_offsets();
3264 java_lang_ThreadGroup::compute_offsets();
3265 if (EnableInvokeDynamic) {
3266 java_lang_invoke_MethodHandle::compute_offsets();
3267 java_lang_invoke_DirectMethodHandle::compute_offsets();
3268 java_lang_invoke_MemberName::compute_offsets();
3269 java_lang_invoke_LambdaForm::compute_offsets();
3270 java_lang_invoke_MethodType::compute_offsets();
3271 java_lang_invoke_CallSite::compute_offsets();
3272 }
3273 java_security_AccessControlContext::compute_offsets();
3274 // Initialize reflection classes. The layouts of these classes
3275 // changed with the new reflection implementation in JDK 1.4, and
3276 // since the Universe doesn't know what JDK version it is until this
3277 // point we defer computation of these offsets until now.
3278 java_lang_reflect_AccessibleObject::compute_offsets();
3279 java_lang_reflect_Method::compute_offsets();
3280 java_lang_reflect_Constructor::compute_offsets();
3281 java_lang_reflect_Field::compute_offsets();
3282 if (JDK_Version::is_gte_jdk14x_version()) {
3283 java_nio_Buffer::compute_offsets();
3284 }
3285 if (JDK_Version::is_gte_jdk15x_version()) {
3286 sun_reflect_ConstantPool::compute_offsets();
3287 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3288 }
3289 if (JDK_Version::is_gte_jdk18x_version())
3290 java_lang_reflect_Parameter::compute_offsets();
3291
3292 // generated interpreter code wants to know about the offsets we just computed:
3293 AbstractAssembler::update_delayed_values();
3294 }
3295
3296 #ifndef PRODUCT
3297
3298 // These functions exist to assert the validity of hard-coded field offsets to guard
3299 // against changes in the class files
3300
3301 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3302 EXCEPTION_MARK;
3303 fieldDescriptor fd;
3304 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3305 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3306 instanceKlassHandle h_klass (THREAD, k);
3307 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3308 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3309 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3310 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3311 return false;
3312 }
3313 if (fd.is_static()) {
3314 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3315 return false;
3316 }
3317 if (fd.offset() == hardcoded_offset ) {
3318 return true;
3319 } else {
3320 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3321 klass_name, field_name, hardcoded_offset, fd.offset());
3322 return false;
3323 }
3324 }
3325
3326
3327 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3328 EXCEPTION_MARK;
3329 fieldDescriptor fd;
3330 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3331 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3332 instanceKlassHandle h_klass (THREAD, k);
3333 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3334 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3335 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3336 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3337 return false;
3338 }
3339 if (!fd.is_static()) {
3340 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3341 return false;
3342 }
3343 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3344 return true;
3345 } else {
3346 tty->print_cr("Offset of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_offset, fd.offset() - InstanceMirrorKlass::offset_of_static_fields());
3347 return false;
3348 }
3349 }
3350
3351
3352 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3353 EXCEPTION_MARK;
3354 fieldDescriptor fd;
3355 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3356 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3357 instanceKlassHandle h_klass (THREAD, k);
3358 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3359 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3360 if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3361 tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3362 return false;
3363 }
3364 if (!fd.is_static() || !fd.has_initial_value()) {
3365 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3366 return false;
3367 }
3368 if (!fd.initial_value_tag().is_int()) {
3369 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3370 return false;
3371 }
3372 jint field_value = fd.int_initial_value();
3373 if (field_value == hardcoded_constant) {
3374 return true;
3375 } else {
3376 tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value);
3377 return false;
3378 }
3379 }
3380
3381
3382 // Check the hard-coded field offsets of all the classes in this file
3383
3384 void JavaClasses::check_offsets() {
3385 bool valid = true;
3386 HandleMark hm;
3387
3388 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3389 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3390
3391 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3392 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3393
3394 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3395 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3396
3397 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3398 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3399
3400 // java.lang.String
3401
3402 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3403 if (java_lang_String::has_offset_field()) {
3404 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3405 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3406 }
3407 if (java_lang_String::has_hash_field()) {
3408 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3409 }
3410
3411 // java.lang.Class
3412
3413 // Fake fields
3414 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3415 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3416
3417 // java.lang.Throwable
3418
3419 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3420 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3421 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3422 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3423
3424 // Boxed primitive objects (java_lang_boxing_object)
3425
3426 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3427 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3428 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3429 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3430 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3431 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3432 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3433 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3434
3435 // java.lang.ClassLoader
3436
3437 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;");
3438
3439 // java.lang.System
3440
3441 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;");
3442 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3443 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3444 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3445
3446 // java.lang.StackTraceElement
3447
3448 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3449 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3450 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;");
3451 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3452
3453 // java.lang.ref.Reference
3454
3455 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3456 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3457 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3458 // Fake field
3459 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3460 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3461 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3462
3463 // java.lang.ref.SoftReference
3464
3465 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3466 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3467
3468 // java.lang.AssertionStatusDirectives
3469 //
3470 // The CheckAssertionStatusDirectives boolean can be removed from here and
3471 // globals.hpp after the AssertionStatusDirectives class has been integrated
3472 // into merlin "for some time." Without it, the vm will fail with early
3473 // merlin builds.
3474
3475 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3476 const char* nm = "java/lang/AssertionStatusDirectives";
3477 const char* sig = "[Ljava/lang/String;";
3478 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3479 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3480 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3481 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3482 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3483 }
3484
3485 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3486 }
3487
3488 #endif // PRODUCT
3489
3490 int InjectedField::compute_offset() {
3491 Klass* klass_oop = klass();
3492 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3493 if (!may_be_java && !fs.access_flags().is_internal()) {
3494 // Only look at injected fields
3495 continue;
3496 }
3497 if (fs.name() == name() && fs.signature() == signature()) {
3498 return fs.offset();
3499 }
3500 }
3501 ResourceMark rm;
3502 tty->print_cr("Invalid layout of %s at %s/%s%s", InstanceKlass::cast(klass_oop)->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
3503 #ifndef PRODUCT
3504 klass_oop->print();
3505 tty->print_cr("all fields:");
3506 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3507 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3508 }
3509 #endif //PRODUCT
3510 fatal("Invalid layout of preloaded class");
3511 return -1;
3512 }
3513
3514 void javaClasses_init() {
3515 JavaClasses::compute_offsets();
3516 JavaClasses::check_offsets();
3517 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3518 }